ld/emultempl/aix.em

   1 # This shell script emits a C file. -*- C -*-
   2 # It does some substitutions.
   3 cat >e${EMULATION_NAME}.c <<EOF
   4 /* This file is is generated by a shell script.  DO NOT EDIT! */
   5
   6 /* AIX emulation code for ${EMULATION_NAME}
   7    Copyright (C) 1991, 1993, 1995 Free Software Foundation, Inc.
   8    Written by Steve Chamberlain <sac@cygnus.com>
   9    AIX support by Ian Lance Taylor <ian@cygnus.com>
  10
  11 This file is part of GLD, the Gnu Linker.
  12
  13 This program is free software; you can redistribute it and/or modify
  14 it under the terms of the GNU General Public License as published by
  15 the Free Software Foundation; either version 2 of the License, or
  16 (at your option) any later version.
  17
  18 This program is distributed in the hope that it will be useful,
  19 but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 GNU General Public License for more details.
  22
  23 You should have received a copy of the GNU General Public License
  24 along with this program; if not, write to the Free Software
  25 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  26
  27 #define TARGET_IS_${EMULATION_NAME}
  28
  29 #include "bfd.h"
  30 #include "sysdep.h"
  31 #include "libiberty.h"
  32 #include "getopt.h"
  33 #include "bfdlink.h"
  34
  35 #include <ctype.h>
  36
  37 #include "ld.h"
  38 #include "ldmain.h"
  39 #include "ldemul.h"
  40 #include "ldfile.h"
  41 #include "ldmisc.h"
  42 #include "ldexp.h"
  43 #include "ldlang.h"
  44 #include "ldctor.h"
  45
  46 static void gld${EMULATION_NAME}_before_parse PARAMS ((void));
  47 static int gld${EMULATION_NAME}_parse_args PARAMS ((int, char **));
  48 static void gld${EMULATION_NAME}_after_open PARAMS ((void));
  49 static void gld${EMULATION_NAME}_before_allocation PARAMS ((void));
  50 static void gld${EMULATION_NAME}_read_file PARAMS ((const char *, boolean));
  51 static void gld${EMULATION_NAME}_free PARAMS ((PTR));
  52 static void gld${EMULATION_NAME}_find_relocs
  53   PARAMS ((lang_statement_union_type *));
  54 static void gld${EMULATION_NAME}_find_exp_assignment PARAMS ((etree_type *));
  55 static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));
  56
  57 /* The file alignment required for each section.  */
  58 static unsigned long file_align;
  59
  60 /* The maximum size the stack is permitted to grow.  This is stored in
  61    the a.out header.  */
  62 static unsigned long maxstack;
  63
  64 /* The maximum data size.  This is stored in the a.out header.  */
  65 static unsigned long maxdata;
  66
  67 /* Whether to perform garbage collection.  */
  68 static int gc = 1;
  69
  70 /* The module type to use.  */
  71 static unsigned short modtype = ('1' << 8) | 'L';
  72
  73 /* Whether the .text section must be read-only (i.e., no relocs
  74    permitted).  */
  75 static int textro;
  76
  77 /* Structure used to hold import file list.  */
  78
  79 struct filelist
  80 {
  81   struct filelist *next;
  82   const char *name;
  83 };
  84
  85 /* List of import files.  */
  86 struct filelist *import_files;
  87
  88 /* List of export symbols read from the export files.  */
  89
  90 struct export_symbol_list
  91 {
  92   struct export_symbol_list *next;
  93   const char *name;
  94   boolean syscall;
  95 };
  96
  97 static struct export_symbol_list *export_symbols;
  98
  99 /* This routine is called before anything else is done.  */
 100
 101 static void
 102 gld${EMULATION_NAME}_before_parse()
 103 {
 104 #ifndef TARGET_                 /* I.e., if not generic.  */
 105   ldfile_output_architecture = bfd_arch_${ARCH};
 106 #endif /* not TARGET_ */
 107 }
 108
 109 /* Handle AIX specific options.  */
 110
 111 static int
 112 gld${EMULATION_NAME}_parse_args (argc, argv)
 113      int argc;
 114      char **argv;
 115 {
 116   int prevoptind = optind;
 117   int prevopterr = opterr;
 118   int indx;
 119   int longind;
 120   int optc;
 121   long val;
 122   char *end;
 123
 124 #define OPTION_IGNORE (300)
 125 #define OPTION_AUTOIMP (OPTION_IGNORE + 1)
 126 #define OPTION_ERNOTOK (OPTION_AUTOIMP + 1)
 127 #define OPTION_EROK (OPTION_ERNOTOK + 1)
 128 #define OPTION_EXPORT (OPTION_EROK + 1)
 129 #define OPTION_IMPORT (OPTION_EXPORT + 1)
 130 #define OPTION_MAXDATA (OPTION_IMPORT + 1)
 131 #define OPTION_MAXSTACK (OPTION_MAXDATA + 1)
 132 #define OPTION_MODTYPE (OPTION_MAXSTACK + 1)
 133 #define OPTION_NOAUTOIMP (OPTION_MODTYPE + 1)
 134 #define OPTION_NOSTRCMPCT (OPTION_NOAUTOIMP + 1)
 135 #define OPTION_STRCMPCT (OPTION_NOSTRCMPCT + 1)
 136
 137   static struct option longopts[] = {
 138     {"basis", no_argument, NULL, OPTION_IGNORE},
 139     {"bautoimp", no_argument, NULL, OPTION_AUTOIMP},
 140     {"bcomprld", no_argument, NULL, OPTION_IGNORE},
 141     {"bcrld", no_argument, NULL, OPTION_IGNORE},
 142     {"bcror31", no_argument, NULL, OPTION_IGNORE},
 143     {"bD", required_argument, NULL, OPTION_MAXDATA},
 144     {"bE", required_argument, NULL, OPTION_EXPORT},
 145     {"bernotok", no_argument, NULL, OPTION_ERNOTOK},
 146     {"berok", no_argument, NULL, OPTION_EROK},
 147     {"berrmsg", no_argument, NULL, OPTION_IGNORE},
 148     {"bexport", required_argument, NULL, OPTION_EXPORT},
 149     {"bf", no_argument, NULL, OPTION_ERNOTOK},
 150     {"bgc", no_argument, &gc, 1},
 151     {"bh", required_argument, NULL, OPTION_IGNORE},
 152     {"bhalt", required_argument, NULL, OPTION_IGNORE},
 153     {"bI", required_argument, NULL, OPTION_IMPORT},
 154     {"bimport", required_argument, NULL, OPTION_IMPORT},
 155     {"bmaxdata", required_argument, NULL, OPTION_MAXDATA},
 156     {"bmaxstack", required_argument, NULL, OPTION_MAXSTACK},
 157     {"bM", required_argument, NULL, OPTION_MODTYPE},
 158     {"bmodtype", required_argument, NULL, OPTION_MODTYPE},
 159     {"bnoautoimp", no_argument, NULL, OPTION_NOAUTOIMP},
 160     {"bnodelcsect", no_argument, NULL, OPTION_IGNORE},
 161     {"bnogc", no_argument, &gc, 0},
 162     {"bnso", no_argument, NULL, OPTION_NOAUTOIMP},
 163     {"bnostrcmpct", no_argument, NULL, OPTION_NOSTRCMPCT},
 164     {"bnotextro", no_argument, &textro, 0},
 165     {"bnro", no_argument, &textro, 0},
 166     {"bro", no_argument, &textro, 1},
 167     {"bS", required_argument, NULL, OPTION_MAXSTACK},
 168     {"bso", no_argument, NULL, OPTION_AUTOIMP},
 169     {"bstrcmpct", no_argument, NULL, OPTION_STRCMPCT},
 170     {"btextro", no_argument, &textro, 1},
 171     {"static", no_argument, NULL, OPTION_NOAUTOIMP},
 172     {NULL, no_argument, NULL, 0}
 173   };
 174
 175   /* Options supported by the AIX linker which we do not support: -f,
 176      -S, -v, -Z, -bbindcmds, -bbinder, -bbindopts, -bcalls, -bcaps,
 177      -bcror15, -bdebugopt, -bdbg, -bdelcsect, -bex?, -bfilelist, -bfl,
 178      -bgcbypass, -bglink, -binsert, -bi, -bloadmap, -bl, -bmap, -bnl,
 179      -bnobind, -bnocomprld, -bnocrld, -bnoerrmsg, -bnoglink,
 180      -bnoloadmap, -bnl, -bnoobjreorder, -bnoquiet, -bnoreorder,
 181      -bnotypchk, -bnox, -bquiet, -bR, -brename, -breorder, -btypchk,
 182      -bx, -bX, -bxref.  */
 183
 184   /* If the current option starts with -b, change the first : to an =.
 185      The AIX linker uses : to separate the option from the argument;
 186      changing it to = lets us treat it as a getopt option.  */
 187   indx = optind;
 188   if (indx == 0)
 189     indx = 1;
 190   if (indx < argc && strncmp (argv[indx], "-b", 2) == 0)
 191     {
 192       char *s;
 193
 194       for (s = argv[indx]; *s != '\0'; s++)
 195         {
 196           if (*s == ':')
 197             {
 198               *s = '=';
 199               break;
 200             }
 201         }
 202     }
 203
 204   opterr = 0;
 205   optc = getopt_long_only (argc, argv, "-D:H:KT:z", longopts, &longind);
 206   opterr = prevopterr;
 207
 208   switch (optc)
 209     {
 210     default:
 211       optind = prevoptind;
 212       return 0;
 213
 214     case 0:
 215       /* Long option which just sets a flag.  */
 216       break;
 217
 218     case 'D':
 219       val = strtol (optarg, &end, 0);
 220       if (*end != '\0')
 221         einfo ("%P: warning: ignoring invalid -D number %s\n", optarg);
 222       else if (val != -1)
 223         lang_section_start (".data", exp_intop (val));
 224       break;
 225
 226     case 'H':
 227       val = strtoul (optarg, &end, 0);
 228       if (*end != '\0'
 229           || (val & (val - 1)) != 0)
 230         einfo ("%P: warning: ignoring invalid -H number %s\n", optarg);
 231       else
 232         file_align = val;
 233       break;
 234
 235     case 'K':
 236     case 'z':
 237       /* FIXME: This should use the page size for the target system.  */
 238       file_align = 4096;
 239       break;
 240
 241     case 'T':
 242       /* On AIX this is the same as GNU ld -Ttext.  When we see -T
 243          number, we assume the AIX option is intended.  Otherwise, we
 244          assume the usual GNU ld -T option is intended.  We can't just
 245          ignore the AIX option, because gcc passes it to the linker.  */
 246       val = strtoul (optarg, &end, 0);
 247       if (*end != '\0')
 248         {
 249           optind = prevoptind;
 250           return 0;
 251         }
 252       lang_section_start (".text", exp_intop (val));
 253       break;
 254
 255     case OPTION_IGNORE:
 256       break;
 257
 258     case OPTION_AUTOIMP:
 259       link_info.static_link = false;
 260       break;
 261
 262     case OPTION_ERNOTOK:
 263       force_make_executable = false;
 264       break;
 265
 266     case OPTION_EROK:
 267       force_make_executable = true;
 268       break;
 269
 270     case OPTION_EXPORT:
 271       gld${EMULATION_NAME}_read_file (optarg, false);
 272       break;
 273
 274     case OPTION_IMPORT:
 275       {
 276         struct filelist *n;
 277         struct filelist **flpp;
 278
 279         n = (struct filelist *) xmalloc (sizeof (struct filelist));
 280         n->next = NULL;
 281         n->name = optarg;
 282         flpp = &import_files;
 283         while (*flpp != NULL)
 284           flpp = &(*flpp)->next;
 285         *flpp = n;
 286       }
 287       break;
 288
 289     case OPTION_MAXDATA:
 290       val = strtoul (optarg, &end, 0);
 291       if (*end != '\0')
 292         einfo ("%P: warning: ignoring invalid -bmaxdata number %s\n",
 293                optarg);
 294       else
 295         maxdata = val;
 296       break;
 297
 298     case OPTION_MAXSTACK:
 299       val = strtoul (optarg, &end, 0);
 300       if (*end != '\0')
 301         einfo ("%P: warning: ignoring invalid -bmaxstack number %s\n",
 302                optarg);
 303       else
 304         maxstack = val;
 305       break;
 306
 307     case OPTION_MODTYPE:
 308       if (*optarg == 'S')
 309         {
 310           link_info.shared = true;
 311           ++optarg;
 312         }
 313       if (*optarg == '\0' || optarg[1] == '\0')
 314         einfo ("%P: warning: ignoring invalid module type %s\n", optarg);
 315       else
 316         modtype = (*optarg << 8) | optarg[1];
 317       break;
 318
 319     case OPTION_NOAUTOIMP:
 320       link_info.static_link = true;
 321       break;
 322
 323     case OPTION_NOSTRCMPCT:
 324       config.traditional_format = true;
 325       break;
 326
 327     case OPTION_STRCMPCT:
 328       config.traditional_format = false;
 329       break;
 330     }
 331
 332   return 1;
 333 }
 334
 335 /* This is called after the input files have been opened.  */
 336
 337 static void
 338 gld${EMULATION_NAME}_after_open ()
 339 {
 340   boolean r;
 341   struct set_info *p;
 342
 343   /* Call ldctor_build_sets, after pretending that this is a
 344      relocateable link.  We do this because AIX requires relocation
 345      entries for all references to symbols, even in a final
 346      executable.  */
 347   r = link_info.relocateable;
 348   link_info.relocateable = true;
 349   ldctor_build_sets ();
 350   link_info.relocateable = r;
 351
 352   /* For each set, record the size, so that the XCOFF backend can
 353      output the correct csect length.  */
 354   for (p = sets; p != (struct set_info *) NULL; p = p->next)
 355     {
 356       bfd_size_type size;
 357
 358       /* If the symbol is defined, we may have been invoked from
 359          collect, and the sets may already have been built, so we do
 360          not do anything.  */
 361       if (p->h->type == bfd_link_hash_defined
 362           || p->h->type == bfd_link_hash_defweak)
 363         continue;
 364
 365       if (p->reloc != BFD_RELOC_CTOR)
 366         {
 367           /* Handle this if we need to.  */
 368           abort ();
 369         }
 370
 371       size = (p->count + 2) * 4;
 372       if (! bfd_xcoff_link_record_set (output_bfd, &link_info, p->h, size))
 373         einfo ("%F%P: bfd_xcoff_link_record_set failed: %E\n");
 374     }
 375 }
 376
 377 /* This is called after the sections have been attached to output
 378    sections, but before any sizes or addresses have been set.  */
 379
 380 static void
 381 gld${EMULATION_NAME}_before_allocation ()
 382 {
 383   struct filelist *fl;
 384   struct export_symbol_list *el;
 385   char *libpath;
 386
 387   /* Handle the import and export files, if any.  */
 388   for (fl = import_files; fl != NULL; fl = fl->next)
 389     gld${EMULATION_NAME}_read_file (fl->name, true);
 390   for (el = export_symbols; el != NULL; el = el->next)
 391     {
 392       struct bfd_link_hash_entry *h;
 393
 394       h = bfd_link_hash_lookup (link_info.hash, el->name, false, false, false);
 395       if (h == NULL)
 396         einfo ("%P%F: bfd_link_hash_lookup of export symbol failed: %E\n");
 397       if (! bfd_xcoff_export_symbol (output_bfd, &link_info, h, el->syscall))
 398         einfo ("%P%F: bfd_xcoff_export_symbol failed: %E\n");
 399     }
 400
 401   /* Track down all relocations called for by the linker script (these
 402      are typically constructor/destructor entries created by
 403      CONSTRUCTORS) and let the backend know it will need to create
 404      .loader relocs for them.  */
 405   lang_for_each_statement (gld${EMULATION_NAME}_find_relocs);
 406
 407   /* We need to build LIBPATH from the -L arguments.  If any -rpath
 408      arguments were used, though, we use -rpath instead, as a GNU
 409      extension.  */
 410   if (command_line.rpath != NULL)
 411     libpath = command_line.rpath;
 412   else if (search_head == NULL)
 413     libpath = (char *) "";
 414   else
 415     {
 416       size_t len;
 417       search_dirs_type *search;
 418
 419       len = strlen (search_head->name);
 420       libpath = xmalloc (len + 1);
 421       strcpy (libpath, search_head->name);
 422       for (search = search_head->next; search != NULL; search = search->next)
 423         {
 424           size_t nlen;
 425
 426           nlen = strlen (search->name);
 427           libpath = xrealloc (libpath, len + nlen + 2);
 428           libpath[len] = ':';
 429           strcpy (libpath + len + 1, search->name);
 430           len += nlen + 1;
 431         }
 432     }
 433
 434   /* Let the XCOFF backend set up the .loader section.  */
 435   if (! bfd_xcoff_size_dynamic_sections (output_bfd, &link_info, libpath,
 436                                          entry_symbol, file_align,
 437                                          maxstack, maxdata,
 438                                          gc ? true : false,
 439                                          modtype,
 440                                          textro ? true : false))
 441     einfo ("%P%F: failed to set dynamic section sizes: %E\n");
 442 }
 443
 444 /* Read an import or export file.  For an import file, this is called
 445    by the before_allocation emulation routine.  For an export file,
 446    this is called by the parse_args emulation routine.  */
 447
 448 static void
 449 gld${EMULATION_NAME}_read_file (filename, import)
 450      const char *filename;
 451      boolean import;
 452 {
 453   struct obstack *o;
 454   FILE *f;
 455   int lineno;
 456   int c;
 457   boolean keep;
 458   const char *imppath;
 459   const char *impfile;
 460   const char *impmember;
 461
 462   o = (struct obstack *) xmalloc (sizeof (struct obstack));
 463   obstack_specify_allocation (o, 0, 0, xmalloc, gld${EMULATION_NAME}_free);
 464
 465   f = fopen (filename, "r");
 466   if (f == NULL)
 467     {
 468       bfd_set_error (bfd_error_system_call);
 469       einfo ("%F%s: %E\n", filename);
 470     }
 471
 472   keep = false;
 473
 474   imppath = NULL;
 475   impfile = NULL;
 476   impmember = NULL;
 477
 478   lineno = 0;
 479   while ((c = getc (f)) != EOF)
 480     {
 481       char *s;
 482       char *symname;
 483       boolean syscall;
 484       bfd_vma address;
 485       struct bfd_link_hash_entry *h;
 486
 487       if (c != '\n')
 488         {
 489           obstack_1grow (o, c);
 490           continue;
 491         }
 492
 493       obstack_1grow (o, '\0');
 494       ++lineno;
 495
 496       s = (char *) obstack_base (o);
 497       while (isspace ((unsigned char) *s))
 498         ++s;
 499       if (*s == '\0'
 500           || *s == '*'
 501           || (*s == '#' && s[1] == ' ')
 502           || (! import && *s == '#' && s[1] == '!'))
 503         {
 504           obstack_free (o, obstack_base (o));
 505           continue;
 506         }
 507
 508       if (*s == '#' && s[1] == '!')
 509         {
 510           s += 2;
 511           while (isspace ((unsigned char) *s))
 512             ++s;
 513           if (*s == '\0')
 514             {
 515               imppath = NULL;
 516               impfile = NULL;
 517               impmember = NULL;
 518               obstack_free (o, obstack_base (o));
 519             }
 520           else if (*s == '(')
 521             einfo ("%F%s%d: #! ([member]) is not supported in import files",
 522                    filename, lineno);
 523           else
 524             {
 525               char cs;
 526               char *file;
 527
 528               (void) obstack_finish (o);
 529               keep = true;
 530               imppath = s;
 531               impfile = NULL;
 532               while (! isspace ((unsigned char) *s) && *s != '(' && *s != '\0')
 533                 {
 534                   if (*s == '/')
 535                     file = s + 1;
 536                   ++s;
 537                 }
 538               if (file != NULL)
 539                 {
 540                   file[-1] = '\0';
 541                   impfile = file;
 542                   if (imppath == file - 1)
 543                     imppath = "/";
 544                 }
 545               else
 546                 {
 547                   impfile = imppath;
 548                   imppath = "";
 549                 }
 550               cs = *s;
 551               *s = '\0';
 552               while (isspace ((unsigned char) cs))
 553                 {
 554                   ++s;
 555                   cs = *s;
 556                 }
 557               if (cs != '(')
 558                 {
 559                   impmember = "";
 560                   if (cs != '\0')
 561                     einfo ("%s:%d: warning: syntax error in import file\n",
 562                            filename, lineno);
 563                 }
 564               else
 565                 {
 566                   ++s;
 567                   impmember = s;
 568                   while (*s != ')' && *s != '\0')
 569                     ++s;
 570                   if (*s == ')')
 571                     *s = '\0';
 572                   else
 573                     einfo ("%s:%d: warning: syntax error in import file\n",
 574                            filename, lineno);
 575                 }
 576             }
 577
 578           continue;
 579         }
 580
 581       /* This is a symbol to be imported or exported.  */
 582       symname = s;
 583       syscall = false;
 584       address = (bfd_vma) -1;
 585
 586       while (! isspace ((unsigned char) *s) && *s != '\0')
 587         ++s;
 588       if (*s != '\0')
 589         {
 590           char *se;
 591
 592           *s++ = '\0';
 593
 594           while (isspace ((unsigned char) *s))
 595             ++s;
 596
 597           se = s;
 598           while (! isspace ((unsigned char) *se) && *se != '\0')
 599             ++se;
 600           if (*se != '\0')
 601             {
 602               *se++ = '\0';
 603               while (isspace ((unsigned char) *se))
 604                 ++se;
 605               if (*se != '\0')
 606                 einfo ("%s%d: warning: syntax error in import/export file\n",
 607                        filename, lineno);
 608             }
 609
 610           if (strcasecmp (s, "svc") == 0
 611               || strcasecmp (s, "syscall") == 0)
 612             syscall = true;
 613           else
 614             {
 615               char *end;
 616
 617               address = strtoul (s, &end, 0);
 618               if (*end != '\0')
 619                 einfo ("%s:%d: warning: syntax error in import/export file\n",
 620                        filename, lineno);
 621             }
 622         }
 623
 624       if (! import)
 625         {
 626           struct export_symbol_list *n;
 627
 628           ldlang_add_undef (symname);
 629           n = ((struct export_symbol_list *)
 630                xmalloc (sizeof (struct export_symbol_list)));
 631           n->next = export_symbols;
 632           n->name = buystring (symname);
 633           n->syscall = syscall;
 634           export_symbols = n;
 635         }
 636       else
 637         {
 638           h = bfd_link_hash_lookup (link_info.hash, symname, false, false,
 639                                     true);
 640           if (h == NULL || h->type == bfd_link_hash_new)
 641             {
 642               /* We can just ignore attempts to import an unreferenced
 643                  symbol.  */
 644             }
 645           else
 646             {
 647               if (! bfd_xcoff_import_symbol (output_bfd, &link_info, h,
 648                                              address, imppath, impfile,
 649                                              impmember))
 650                 einfo ("%X%s:%d: failed to import symbol %s: %E\n",
 651                        filename, lineno, symname);
 652             }
 653         }
 654
 655       obstack_free (o, obstack_base (o));
 656     }
 657
 658   if (obstack_object_size (o) > 0)
 659     {
 660       einfo ("%s:%d: warning: ignoring unterminated last line\n",
 661              filename, lineno);
 662       obstack_free (o, obstack_base (o));
 663     }
 664
 665   if (! keep)
 666     {
 667       obstack_free (o, NULL);
 668       free (o);
 669     }
 670 }
 671
 672 /* This routine saves us from worrying about declaring free.  */
 673
 674 static void
 675 gld${EMULATION_NAME}_free (p)
 676      PTR p;
 677 {
 678   free (p);
 679 }
 680
 681 /* This is called by the before_allocation routine via
 682    lang_for_each_statement.  It looks for relocations and assignments
 683    to symbols.  */
 684
 685 static void
 686 gld${EMULATION_NAME}_find_relocs (s)
 687      lang_statement_union_type *s;
 688 {
 689   if (s->header.type == lang_reloc_statement_enum)
 690     {
 691       lang_reloc_statement_type *rs;
 692
 693       rs = &s->reloc_statement;
 694       if (rs->name == NULL)
 695         einfo ("%F%P: only relocations against symbols are permitted\n");
 696       if (! bfd_xcoff_link_count_reloc (output_bfd, &link_info, rs->name))
 697         einfo ("%F%P: bfd_xcoff_link_count_reloc failed: %E\n");
 698     }
 699
 700   if (s->header.type == lang_assignment_statement_enum)
 701     gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
 702 }
 703
 704 /* Look through an expression for an assignment statement.  */
 705
 706 static void
 707 gld${EMULATION_NAME}_find_exp_assignment (exp)
 708      etree_type *exp;
 709 {
 710   struct bfd_link_hash_entry *h;
 711
 712   switch (exp->type.node_class)
 713     {
 714     case etree_provide:
 715       h = bfd_link_hash_lookup (link_info.hash, exp->assign.dst,
 716                                 false, false, false);
 717       if (h == NULL)
 718         break;
 719       /* Fall through.  */
 720     case etree_assign:
 721       if (strcmp (exp->assign.dst, ".") != 0)
 722         {
 723           if (! bfd_xcoff_record_link_assignment (output_bfd, &link_info,
 724                                                   exp->assign.dst))
 725             einfo ("%P%F: failed to record assignment to %s: %E\n",
 726                    exp->assign.dst);
 727         }
 728       gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
 729       break;
 730
 731     case etree_binary:
 732       gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
 733       gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
 734       break;
 735
 736     case etree_trinary:
 737       gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
 738       gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
 739       gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
 740       break;
 741
 742     case etree_unary:
 743       gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
 744       break;
 745
 746     default:
 747       break;
 748     }
 749 }
 750
 751 static char *
 752 gld${EMULATION_NAME}_get_script(isfile)
 753      int *isfile;
 754 EOF
 755
 756 if test -n "$COMPILE_IN"
 757 then
 758 # Scripts compiled in.
 759
 760 # sed commands to quote an ld script as a C string.
 761 sc="-f ${srcdir}/emultempl/stringify.sed"
 762
 763 cat >>e${EMULATION_NAME}.c <<EOF
 764 {
 765   *isfile = 0;
 766
 767   if (link_info.relocateable == true && config.build_constructors == true)
 768     return
 769 EOF
 770 sed $sc ldscripts/${EMULATION_NAME}.xu                     >> e${EMULATION_NAME}.c
 771 echo '  ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c
 772 sed $sc ldscripts/${EMULATION_NAME}.xr                     >> e${EMULATION_NAME}.c
 773 echo '  ; else if (!config.text_read_only) return'         >> e${EMULATION_NAME}.c
 774 sed $sc ldscripts/${EMULATION_NAME}.xbn                    >> e${EMULATION_NAME}.c
 775 echo '  ; else if (!config.magic_demand_paged) return'     >> e${EMULATION_NAME}.c
 776 sed $sc ldscripts/${EMULATION_NAME}.xn                     >> e${EMULATION_NAME}.c
 777 echo '  ; else return'                                     >> e${EMULATION_NAME}.c
 778 sed $sc ldscripts/${EMULATION_NAME}.x                      >> e${EMULATION_NAME}.c
 779 echo '; }'                                                 >> e${EMULATION_NAME}.c
 780
 781 else
 782 # Scripts read from the filesystem.
 783
 784 cat >>e${EMULATION_NAME}.c <<EOF
 785 {
 786   *isfile = 1;
 787
 788   if (link_info.relocateable == true && config.build_constructors == true)
 789     return "ldscripts/${EMULATION_NAME}.xu";
 790   else if (link_info.relocateable == true)
 791     return "ldscripts/${EMULATION_NAME}.xr";
 792   else if (!config.text_read_only)
 793     return "ldscripts/${EMULATION_NAME}.xbn";
 794   else if (!config.magic_demand_paged)
 795     return "ldscripts/${EMULATION_NAME}.xn";
 796   else
 797     return "ldscripts/${EMULATION_NAME}.x";
 798 }
 799 EOF
 800
 801 fi
 802
 803 cat >>e${EMULATION_NAME}.c <<EOF
 804
 805 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
 806 {
 807   gld${EMULATION_NAME}_before_parse,
 808   syslib_default,
 809   hll_default,
 810   after_parse_default,
 811   gld${EMULATION_NAME}_after_open,
 812   after_allocation_default,
 813   set_output_arch_default,
 814   ldemul_default_target,
 815   gld${EMULATION_NAME}_before_allocation,
 816   gld${EMULATION_NAME}_get_script,
 817   "${EMULATION_NAME}",
 818   "${OUTPUT_FORMAT}",
 819   0,    /* finish */
 820   0,    /* create_output_section_statements */
 821   0,    /* open_dynamic_archive */
 822   0,    /* place_orphan */
 823   0,    /* set_symbols */
 824   gld${EMULATION_NAME}_parse_args,
 825 };
 826 EOF